MAX14523A Maxim, MAX14523A Datasheet

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MAX14523A

Manufacturer Part Number
MAX14523A
Description
The MAX14523A/MAX14523AL/MAX14523B/MAX14523C programmable current-limit switches feature internal current limiting to prevent damage to host devices due to faulty load conditions
Manufacturer
Maxim
Datasheet

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The MAX14523A/MAX14523AL/MAX14523B/MAX14523C
programmable current-limit switches feature internal
current limiting to prevent damage to host devices due
to faulty load conditions. These current-limit switches
feature a low 70mΩ on-resistance and operate from a
+1.7V to +5.5V input voltage range. The current limit is
adjustable from 250mA to 1.5A, making these devices
ideal for SDIO (secure digital input/output) and other
load-switching applications.
Each device in the family handles an overcurrent event
differently depending on the option selected. The
MAX14523A/MAX14523AL go into an autoretry mode,
the MAX14523B latches off the switch, and the
MAX14523C features a continuous current-limit mode.
Additional safety features include thermal shutdown to
prevent overheating and reverse-current blocking to
prevent current from being driven back into the source.
The MAX14523A/MAX14523AL/MAX14523B/MAX14523C
are available in a tiny 8-pin, 3mm x 3mm, TDFN pack-
age and operate over the -40°C to +125°C automotive
temperature range.
19-4814; Rev 1; 1/11
Pin Configuration appears at end of data sheet.
Note: All devices are specified over the -40°C to +125°C operating temperature range.
+ Denotes a lead(Pb)-free package/RoHs-compliant package.
/V denotes an automotive qualified part.
* EP = Exposed pad.
** Future product—contact factory for availability.
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
MAX14523AATA+
MAX14523ALATA+**
MAX14523BATA+
MAX14523BATA/V+T
MAX14523CATA+
SDIO Ports
USB Ports
Notebook VGA Ports
GPS
Cell Phones
MP3 Players
UTCA/ATCA Platforms
PART
________________________________________________________________ Maxim Integrated Products
General Description
PIN-PACKAGE
8 TDFN-EP*
8 TDFN-EP*
8 TDFN-EP*
8 TDFN-EP*
8 TDFN-EP*
Applications
TOP MARK
250mA to 1.5A, Adjustable
BLO
BLQ
BLQ
BLP
BLS
Ordering Information/Selector Guide
Current-Limit Switches
♦ Accurate (±10%) Overload Current Limit
♦ Adjustable Current-Limit Threshold
♦ Low-Dropout Voltage (70mV at 1A Load Current)
♦ Short-Circuit Protection
♦ Thermal-Shutdown Protection
♦ Reverse-Current Protection
♦ 170µA (typ) Supply Current
♦ Shutdown Reverse Current, 0.6µA (max)
♦ +1.7V to +5.5V Supply Voltage Range
♦ Tiny 8-Pin, 3mm x 3mm, TDFN Package
*ON FOR THE MAX14523AL ONLY.
SUPPLY
POWER
μP
10kΩ
ON POLARTIY
V
Active-High
Active-High
Active-High
Active-High
PULLUP
Active-Low
R
1μF
SETI
Typical Operating Circuit
IN
FLAG
ON(ON)*
REFERENCE
CURRENT
OVERCURRENT RESPONSE
GND
MAX14523AL
MAX14523A
MAX14523B
MAX14523C
Continuous
CONTROL
VOLTAGE
CHARGE
PUMP
LOGIC
BIAS
Latch-Off
Latch-Off
Autoretry
Autoretry
Features
OUT
N.C.
1μF
LOAD
1

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MAX14523A Summary of contents

Page 1

... SDIO (secure digital input/output) and other load-switching applications. Each device in the family handles an overcurrent event differently depending on the option selected. The MAX14523A/MAX14523AL go into an autoretry mode, the MAX14523B latches off the switch, and the MAX14523C features a continuous current-limit mode. Additional safety features include thermal shutdown to prevent overheating and reverse-current blocking to prevent current from being driven back into the source ...

Page 2

... For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial. Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability ...

Page 3

... Note 2: All devices are 100% tested at 125°C. Electrical limits across the full temperature range are guaranteed by design and correlation. Note 3: Blanking time and retry time are generated by the same oscillator. Therefore, the ratio of See Figures 2 and 3. ON(ON)* V OUT *( ) THE POLARITY OF THE SIGNAL IS REVERSED FOR THE MAX14523AL ONLY. Figure 1. Timing Diagram for Measuring Turn-On Time (t _______________________________________________________________________________________ 250mA to 1.5A, Adjustable Current-Limit Switches = C = 1µ ...

Page 4

Adjustable Current-Limit Switches t BLANK OUT CURRENT LIMIT LOAD CURRENT FLAG Figure 2. Autoretry Fault Diagram OUT CURRENT LIMIT LOAD CURRENT THE DEVICE GOES TO THERMAL-SHUTDOWN MODE FLAG Figure 3. Latchoff Fault Diagram 4 _______________________________________________________________________________________ t t ...

Page 5

C = 1µ 1µ OUT CURRENT LIMIT vs. SUPPLY VOLTAGE 1.60 1.55 1.50 1.45 1.40 1.70 2.65 3.60 4.55 SUPPLY VOLTAGE (V) QUIESCENT SUPPLY CURRENT vs. TEMPERATURE 300 250 V = +5V ...

Page 6

Adjustable Current-Limit Switches (V = +3.3V 1µ 1µ OUT SHUTDOWN REVERSE CURRENT vs. TEMPERATURE 0V +1.7V +5. OUT ...

Page 7

... C = 1µ 1µ OUT CURRENT LIMIT RESPONSE MAX14523A toc13 SUDDEN SHORT APPLIED AT OUTPUT V OUT 2V/div I OUT 10A/div 2μs/div PIN MAX14523A NAME MAX14523B MAX14523AL MAX14523C N. SETI 4 4 OUT GND — — ...

Page 8

... IN N.C. MAX14523A MAX14523AL MAX14523B MAX14523C ON/(ON FOR THE MAX14523AL ONLY Detailed Description The MAX14523A/MAX14523AL/MAX14523B/MAX14523C programmable current-limit switches operate from +1.7V to +5.5V and provide internal current limiting adjustable from 250mA to 1.5A. These devices feature a fixed blanking time, and a FLAG output that notifies the processor when a fault condition is present. ...

Page 9

... Adjustable Current-Limit Switches The ON input for the MAX14523A/MAX14523B/ BLANK MAX14523C and ON input for the MAX14523AL control , when the switch the switch, see Table 1. Toggle ON for the MAX14523B to reset the fault condition once the short-circuit current is detected and the device shuts down. ...

Page 10

... PROCESS: BiCMOS ( *CONNECT EXPOSED PAD TO GND. **( ) FOR THE MAX14523AL ONLY. = 10ms, and I = LIM For the latest package outline information and land patterns www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status ...

Page 11

... Added the MAX14523BATA automotive-grade part to the Ordering Information Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. ...

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